Nite Times News

NITE-TIMES
NEWS

CHICAGO AREA TIMEX USERS GROUP

Lago ated Cimex Users Group owners Grove, nois
Volume 7, Number 5 September/October 1993
MEMORY MAP
ROUTINES ADDRESS
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Secretary? S NOC6BAd 14 La italai dais seca e Pilis aa is Ka o ao 3
GATOR's Twisted Pair ....cccensccecees E E wide E ET 4
Itens- for SALE through- the CLUD zares rrerss aki Ne a 4
Special Deals and Buys lerer ss 4 dis je aa aa bes ja ais 5
Articles:
MORE MINERAL OIL! ius ce ees eoa a n ew eee 5
OL Chad lenges: ie adata TEE Ianas Sa Sadas S RE 6
OL WOES Taan a aa a ei AS S aa a ara ane k sis da 8

C.A.T.U.G. CLUB OFFICERS

Here is the list of 1993 club officers and how to contact them.
The club has two strong SIGS, SPECTRUM/TS2068 and OL. If you
have questions about either of these fine machines, or even the

ZX81/TS1000/TS1500, call one of the officers. C=312, S=708.
POSITION NAME PHONE PRIMARY FUNCTION

President Nazir Pashtoon S439-1679 The buck stops here...
Vice-President Steve Cooper S968-3553 Meeting Planning, etc.
Secretary Larry Sauter C763-5383 Records and Reporting
Treasurer Frank Mills S544-1918 Dues and Purchasing
Editor Bob Swoger S576-8068 Newsletter, BBS, etc.

Copyright (C)1993 Chicago Area Timex Users Group, Streamwood, IL
NITE-TIMES NEWS

Volume 7, Number 5 1 September/October 1993

TL ——— eee

Nite-Timesgs information

The Rite-Times Rews is the
newsletter of the Chicago Area
Timex Users Group. For an
annual fee of $12.00 you can
become a CATUG member and
receive six newsletters each
year. Write your check payable
to:

FRANK MILLS

417 S 47th AVE

BELLWOOD IL 60104

The Chicago Area Timex Users
Group is pleased to exchange
newsletters with other Timex
and Sinclair supporting user
groups at no charge. Send all
newsletter requests to:

CATUG EDITOR BOB SWOGER
613 PARKSIDE CIRCLE
STREAMWOOD IL 60107-1647

If you desire to reprint any
articles that appear here,
please provide credit to the
author and this newsletter.

We encourage your user group to
copy this newsletter and
distribute it at your regular
meetings to your members free
of any charge as we believe
that this will encourage better
meeting attendance. If you are
a user group that feels as we
do, please let us know in your
newsletter so that we might do
this for our members and keep
our attendance up.

Articles originating from our
group may be downloaded from
our BBS and reprinted.

CONTRIBUTORS TO THIS ISSUE

Bill Lawson

Frank Mills

Nazir Pashtoon
Larry Sauter

Bob Swoger, K9WVY

CLUB MEETINGS

The Chicago Area Timex Users
Group meets on the THIRD
Saturday of each month at the

home of our meeting coordinator
Steve Cooper in Downers Grove,
Illinois from 1:00 to 5:00 PM.
Steve's home is lovingly called
the CLUB HOUSE and is located
at 1300 Maple Street in Downers
Grove just 2 blocks southwest
of the Downers Grove Public
Library. Steve should always be
contacted evenings at 708/968-
3553 to confirm the meeting
schedule.

BUS STOP

Little Boy Blue
by Eugene Field

The little toy dog was covered
with dust, But sturdy and
staunch he stands; And the
little toy solder is red with
rust, And his musket molds in
his hands.

Time was when the little toy
dog was new, And the solder was
passing fair; And that was the
time when our Little Boy Blue
Kissed them and put them there.

"Now don't you go till I come,"
he said, "And don't you make
any noise!" So, toddling off to
his trundle bed, He dreamt of
his pretty toys; And while he
was sleeping an angle song
awakened our Little Boy Blue---
Oh! the years are many, the
years are long, but the little
toy friends are true!

Aye, faithful to Little Boy Blue
they stand, Each in the same old
place--- Awaiting the touch of a
little hand, The smile of a
little face; And they wonder, as
waiting the long years through
in the dust of that little
chair, What has become of our
Little Boy Blue Since he kissed
them and put them there?

We are often told by family
members that our Sinclair
Machines are our favorite toys
and our user group is, for each
of us Sinclairists, a second
family. Well, no TOY we have

ever had has given us so many
years of un-interrupted
pleasure and caused us to
become acquainted with so many
wonderful friends. Such a
friend was our Secretary, Jim
Brezina, who went to be with
the LORD September 26, 1993.
Articles he submitted to past
issues of The Rite-Times News
showed us all how much fun he
had with his TS2068/Zebra disk
drive system. We could always
count on this blue-eyed,
smiling CATUG member to be at
all the meetings as well as the
annual picnics.

We at CATUG shall miss Jim
all the days of our lives!

TREASURY NOTES

The balance as of Oct. 30, 1993
is $351.73 Our current paid
membership stands at 19.

Frank Mills, Treasurer
Chicago Area Timex Users Group

SECRETARY'S NotePad

September 18, 1993

Present were President Nazir
Pashtoon, John Pagano, Steve
Cooper, Abed Kahale, Larry
Sauter, and Bob Swoger. The
meeting opened with the second
showing on Steve Coopers theater
sized TV screen of the video
made at the ISTUG Picnic showing
the 288 acquired by Paul
Holmgren. See last month's
Rite-Times News for the

account.

Next came a report from Bob
Swoger on the Dayton
ComputerFest. He reported that
more than 30 T/Sers had come to
the Fest in which about 35000
people attended through out.
There were bargains galore!
Among those attending were Jon
Kaczor, Steve Spalding, Keith
Watson, Doug Gillespee, Neil
Schultz, Bill Heberline, Frank
and Carol Davis, Hugh Howie,
Steve Taylor, DG Smith, Greg

Newkirk, Gary Ganger, Paul
Holmgren, Don Lambert, Tim
Swensen, Dave Lassov, Mel
Laverne and Bob Swoger, just to
name a few.

Gary Ganger's Sir Clive Museum
was across from Don Lambert's
T/SNUG table giving folks ZXir
QLive Alive! newsletters as well
as the past newsletters of all
North American user groups. Bob
Swoger of CATUG shared the table
and was selling LogiCall for
LarKen systems.

Frank and Carol Davis worked a
very busy table. UPDATE!
magazine was sold there, ISTUG
was represented with Mechanical
Affinity goodies of all kinds,
hardware and software for ZX81/
TS1000, TS2068 and Spectrum, QL
and even the latest, ZX88. A
ZX88 was also there for sale.

Paul Holmgren was at the next
table for QUANTA and ISTUG. More
ZX81/TS1000, TS2068 and QL
goodies. QL keyboard contact
overlays were going for $12. A
JLO Disk drive/EPROM burner/
Printer interface package was
going for $150.

Bill Heberline and Neil Shultz
manned the SMUG booth which was
heavy with brand new books and
software for both 2X81 and
TS2068. I found books there I'd
never seen before.

Tim Swenson and his wife
provided a picnic for the 22
Sinclair users that showed up
Saturday evening. With fewer
people showing up on Sunday,
there was more room to breath
and the goodies were easier to
find. There are always a few
more bargains after noon on
Sunday. Motel rooms in the area
were still plentiful.

October 16, 1993

The meeting opened with a second
showing of the ISTUG picnic
video at 2:50 PM for the benefit
of Treasurer Frank Mills who had
missed the first showing. Those
present were Frank Mills, Larry

ome ee

Sauter, Steve Cooper, Bob
Swoger, Nazir Pashtoon and Abed
Kahale.

Bob Swoger brought a tape for
Cooper's TS2068 using JLO disk
operating system to try to
rebuild the LogiCall ensemble
modified for JLO systems. The
accident of erasing the
previous disk happened when Bob
tried to format a disk in drive
one only to find that disks can
only be FORMATted in drive 0.

Ruth Fegly called to ask about
our long over due newsletters.
Bob told her that all six would
be printed this year, that he
had no articles and had
experienced burn-out.

Hugh Howie asked us how many
would come to a Toronto Sinclair
Fest if one were held in the
summer of 1994. Only one,
possibly two would go that
distance. Neil Schultz of SMUG
said five of his group would go.

Bob is trying to collect RLE
pictures for the TS2068. He has
been getting pictures from a
Macintosh and hopes to get some
from Abed's MS-DOS machine. He
hopes to create a NTN article
with this effort. Our LOGO on
the cover of NTN has long been
an RLE given to us by Past
President Gary Lessenberry. Our
editor no longer cuts and pastes
it on our cover page but
instead, prints it out with the
rest of the text using a laser
printer rather that a dot matrix
printer. We feel that the LOGO
has a little less character now.
It seemed to us that the old way
gave us windows in the
buildings!

Also, while scanning pictures
with the MAC, he realized he can
now scan the LKDOS manual and
with character recognition
software, be able to clean up
Larry's manual.

Swoger reported that he solved
the Kealy/Lambert mystery which
explains how a Spectrum can be
booted in a drive other than 0

or 4. Previously it was thought
that the 'K' key had to be help
down on power-up to switch to
the Spectrum ROM in the DOCK
port using AUTOSTART. He now has
this feature in LogiCall. Abed
put out a request for PD
librarians for the Z88 and the
QL. Donaldson is thought to be
the best bet for our group, he
will be asked at the next
meeting. Nazir stated that we
can't share PD libraries with
other groups because we have
nothing to share! We shall work
on this problem.

The meeting adjourned at 3:20
PM.

Larry Sauter, Secretary
Chicago Area Timex Users Group

GATOR's TWISTED PAIR

tr! REMEMBER pot
We have a 24 hour BBS and
encourage you to exchange mail
and contribute to the Download
Section. Use it and have fun!

Call the BBS at 708-632-5558
and register. On your next call
your security level will be
increased to 5 on this RBBS and
you will be able to have most
privileges.

Bob Swoger, SYSOP
Chicago Area Timex Users Group

ITEMS FOR SALE THROUGH THE CLUB

It has come to our attention
that some LarKen Users are
using something less than
Version 3 firmware. The club
will supply updated EPROMs,
SYSTEM DISKS, and MANUALS for
just $5 which includes shipping
and handling, free if ordered
with LogiCall or Spectrum ROM.

If you are a LarKen LKDOS
owner and would like a SPECTRUM
V2 kit for your system we will
supply an EPROM, socket and
74HCT32 for $12 which includes
shipping and handling. The
install instructions are in
your LarKen manual. We shall
not be responsible for your

install job. AERCO owners need
only the SPECTRUM EPROM for $10

If you have a mismatch between
you LarKen DOS EPROM and your
Western Digital Controller
chip, we will send you the
correct one for free on behalf
of our friends Rod Gowen of RMG
and Larry Kenny of LarKen. You
should be using L3 EPROMs with
WD1770 controller chips or L3F
EPROMsS with WD1772 controller
chips. Check it out! Call in
requests to Bob Swoger at
W708-576-8068 H708-837-7957

SPECIAL DEALS AND BUYS

NAP Ware (Nazir A. Pashtoon's
new endeavor) announces the
availability of all Timex or QL
PAL (Programmable Array Logic)
chips. If interested, call him
evenings on 708-439-1679.

LogiCall Integrated Software
Ensemble easy operating system
for LKDOS in both TS2068 and
Spectrum modes includes
LogiCall 5.0 TASWORD TWO v2.8,
VU-CALC V1.6, VU-FILE and
MTERM2 Drivers modified for
LogiCall, DISKS.B1 TAPES.B1
steprt.Bl HEADER. BT (tape
header reader by Nazir
Pashtoon) FORMAT.B MOVE.BL and
more all on 2 SSDD disks for
$15. You must specify your
LKDOS EPROM version. If you
already have a copy you are
encouraged to distribute copies
to other LarKen LKDOS users
for as you see by the price we
are not in the business of
making money on it, just making
LarKen's LKDOS even better!
Call in requests to Rod Gowen
of RMG Enterprises or Frank
Davis of Mechanical Affinity.

So you like to fly? The 747
Flight Simulator for Spectrum
by Derek Ashton of DACC sold
over 40K copies in EUROPE.
Requires Spectrum Emulator. At
this time supplied on LarKen
SSDD disk only for $10 which
goes to Derek Ashton, now
working at MOTOROLA with Bob
Swoger. Call in requests to Bob
at W708-576-8068 H708-837-7957

ARTICLES

MORE MINERAL OIL!
by Bob Swoger

In past issues we have talked
about the uses of mineral oil
to keep ZX81/TS1000s from
crashing, healing the TS2050
and DOS interface intermittent
operation, RCA phono connector
and sub-miniature phone jack
noise problems as well as
restoring printer ribbons.

Our church organist had enough
with the strange sounds coming
out of our Allen organ. Seems
the more than 48 dual triodes
had pretty dry pins. Placing a
little mineral oil in a bowl, I
removed the tubes and dipped
the pins in the mineral oil,
just enough to go half way up
the pins, and plugged each tube
back into the socket. Amazing
just how easy they went back in
as compared to the removal of
each. Yep, quieted those
beauties right up! Does the
same thing for microphone
connectors.

Tuner cleaner just doesn't do
the job because after the
cleaning, no lubricant is left
behind so corrosion will set
in, not so with mineral oil.
Oxygen can't get to the metal
any more so the electrical
contact lasts for many years.

By the way, don't use tuner
cleaner on potentiometers.
There is some kind of lubricant
on them that tuner cleaner
removes making the pot forever
noisy! There is, however, a pot
cleaner available, ask for it.

If you are having trouble with
ICs in IC sockets, clean them
with tuner cleaner if you wish
but put some mineral oil ina
saucer and dip the IC pins into
the mineral oil before
inserting the IC into the
socket. The IC will go in so
much easier!

In responce to the article below reprinted from Nov.-Dec. '92 SINK-LINK,
Nazir Pashtoon follows with the article "OL Woes".

QL QL OL QL QL OL QL QL OL QL QL OL QL QL QL QL OL QL OL QL

My purpose in writing is to tell you about the problems 'CHALLENGES'
that seem to haunt my QL. I Believe that living on the 18th floor of 22
story building has a lot to do with it. For example, this attempt is the
fourth and the one that has progressed most, in words typed and saved.
Twice the cursor disappeared and the machine locked up. The third time,
when reloading the program, I got a READ/WRITE failed message. I gave
up and went for supper.

This photo was taken in June. I was working when all at once the monitor
blinked. The start screen appeared followed by the window of large
print, or should I say super letters/digits. The second photo (not
shown) indicated that the information in the window was continually
changing. I shut the equipment down rather than wait for the end. At
least a month or two later, the screen displayed what I thought was
'CODE' and shortly after resetting the machine, the same thing happened
except this time it 'SCROLLED' the code and I wondered if I had just
seen the 'ROM' go by. I've been moving stuff around and have made many
saves as well as two printings and we're still going strong. Do you
think it's the BUILDING???

QL OL OL OL OL QL QL OL OL OL QL QL QL QL QL QL QL QL QL OL

Another challenge that occurs from time to time is DOUBLE LISTINGS in
the DIRectory, the same name listed one below the other. I have been
told that I must have placed an extra space, when saving, that does not
show up in the listing. I have tried to put in extra spaces but I'm sure
they are not included in the save. I have copied to another disk,
deleted one of the names and one of the two remains, then tried to
DELETE the other only to be advised program does not exist!

I have copied the disk, taken down the number of sectors used, deleted
the file, taken the numbers again and found there is still something
in memory even though a reguest to load is responded to with program
does not exist.

Recently, my # 2 drive began to act up. It demonstrated this by listing
approx. 7 files when I knew there were 69 files on the disk. I proved it
by placing the disk in another drive and reguested a DIR and got the
result I was expecting. I learned from Louis Laferriere that the slides
for the head probably need a polish. So, I shut the system down,
unplugged the power supply, removed the drive from its case, removed two
small groups of lead connectors and two screws. This allows the removal
of the top board and exposes the head mechanism. By wrapping an inch
wide strip of (soft) cloth around the guide rod, working the cloth up
and down, you remove any build up of dust, etc. The head can be slid
back and forth to allow you to get at most of the guide rods. Reassemble
and test. My effort paid off immediately. One might get the idea that he
knew what he was about.

On board this QL is a MINERVA ROM installed by George Chambers. For a
long time after, when the screen that tells what is connected, i.e. care
QJUMP TOOLKIT ver. 2.09 @ 1984 and under that, CUMANA D1SK Interface ver
1.14, which was repeated three times. Recently, I read one of Howard
Clases' articles where he explained with MINERVA, upon power up, the
checking system may pass by the particular spot and each time it would
report and record. My apologies to Mr. Clase for the terminology and my
thanks, as I often wondered why there were three printings. By the way,
it doesn't happen now!

It is noted that my last 'CONTRIBUTION' to the newsletter appeared in
the JUL/AUG 1989 issue, so I will take this opportunity to say thanks to
all the other contributing members who help me learn more about QL
SuperBASIC and to the local club members who make computing
possible for me.

W K (Bill) Lawson From NOV/DEC 1992 SINC-LINK

Note: If you were to equip Bill Lawson's EPROM adapter for the QL with,
Say, a JS, JSU, JM, MGUK, or MGUS version of QDOS, you will not see the
numbers on the screen that Bill describes. You will just have a crashing
machine, or a machine which does not initialize properly. This
Phenomenon is different from the so called ‘heating" machine. See the
following article. NAP

2

| a

QL Woes
by Nazir A. Pashtoon

AV AO NO AO NO OS DO NO NO No Do

Mmm OL WOE 1

Bill Lawson article (Nov/Dec 92
Toronto" s SINC-LINK) mentioned a myriad
of symptoms of his malfunctioning OL
system. I hope he has resolved and
sorted out these problems. The symptoms
he mentioned;

Cursor disappears and machine locks up,
READ/WRITE FAILED

Double listing of DIRectories.

Use DELETE, get PROGRAM DOES NOT EXIST.
Windows changing constantly.

Code? scrolls by.

MINERVA ROM is on board,

and a few more, apply to approximately
a dozen QLs in my user group (CATUG)
and my own. These problems invariably
surface when a daughter-board with
Minerva or QDOS EPROM is installed in
the QL. To solve these problems,
proceed as follows:

A) All the important integrated
circuits in the QL are socketed.
Socketed computers from LISA to the
first shipments of ATARI ST and other
computers were plagued by unreliable
operation. The same is true of the QL.
Many times the microdrive problem and
unreliable video blanking is directly
traceable to the ZX8302 and ZX8301
chips. Note that these two ICS are
CMOS, and static-sensitive, touch a
grounded metal object with your fingers
before you touch the ICs. When you open
your QL, it is advisable to spray the
pins and sockets of these ICs, as well
as the pin rows and sockets of other
ICs with a “tuner cleaner”, such as
Radio Shack #64-3320, or equivalent.
After spraying, use a flat-bit screw
driver, or a butter knife to displace
the chip slightly upwards from both
ends. Spray again, and press the
integrated circuits back in place. This
cleaning should suffice for at least a
year.

B) As mentioned earlier, many users who
had fully functional machines, started
having problems when they installed a
small EPROM daughter-board inside the
QL. After carefully studying the
problem in about a dozen cases, I
concluded that the problem is caused by
hairline cracks in the copper traces of

the daughter board.
hairline cracks caused?

How are these

After watching our members, and my own
practice of how I would install the
daughter-board on the QL motherboard,
it became obvious that we ourselves
were the culprits. To explain, normally
we would first install the daughter-
board by pressing on the corners of the
board, and then press-in the EPROM.
Both the procedure as well as the order
in which the task is performed are
wrong. Why?

The daughter-boards we were using, are
flimsily constructed from very thin
copper traces (to keep costs down, this
is true of all peripheral boards, and
the QL motherboard). As the figure
shows, two sockets are installed side-
by-side, with approximately 0.2"
spacing, one socket that is used for
the EPROM is an ordinary dual-leaf
socket, and the other one is a machined
socket. The pins of the machined socket
protrude, and is fitted in the ROM
socket on the QL mother-board. In order
to install two sockets side-by-side one
has to saw-off the socket stabilizing
bridges (two or three). The consequence
of this is that when you want to
install an EPROM in the normal socket,
it flexes the socket rows sideways so
much that some times it is not possible
to install the EPROM. This flexing
causes the hairline cracks in the
copper traces on the back of the
daughter-board. Belatedly, one
discovers that in order to install the
EPROM, one has to hold the two rows of
the socket pins of the normal socket
vertically by one hand, and then fit
the EPROM in the socket. We discover
this after we have already caused
damage to probably more than one trace.

The second mechanism causing the
cracks, is the way we normally install
the flimsily made daughter-board, by
pushing on the corners of the board.
This method of installation causes too
much pressure on the corner pins of the
machined socket, and possible hairline
cracks. As such, the suggested
procedure for installation is to:

+ First install the EPROM on the
daughter-board, while holding the
normal socket in a vertical position
with one hand, thus avoiding the

flexing of the pins of the normal
socket.

+» Second, install the daughter-board on
the motherboard by pressing on TOP of
the EPROM, thus causing the pressure to
be equally distributed on all the pins
of the machined socket.

All these hassles could have been
avoided if the boards were properly
manufactured. For example, metalization
both on top and bottom of the daughter-
board would have helped. Most
importantly, instead of using a low
cost machined socket, the use of DIP
socket carrier (say Digi-Key #ED6028,
$3.26) would have totally solved the
problem. In this case you will have the
benefit of machined pins, with pins
flush on top, thus allowing the normal
socket to straddle the socket carrier
pins on top, without having to saw off
the stabilizing plastic bridges.

The hairline cracks that I mentioned
are hard to see even under a magnifying
glass. Static testing by continuity
measurements (using a VOM) could also
be misleading. One can dynamically test
by say, using a logic probe. One may
even be tempted to cure the problem by
putting solder globs on the affected
traces. I recommend against it. The
only sure method of solving the problem
is, to do point-by-point wiring between
the pins of the two sockets. This is
much easier than it sounds. As shown in

” nn
Machined A ji l l
NT

pin

socket Normál
socket
for EPROM
Back view of the daughter-board.
The decoder IC is
a 74HCT00 on my board.
the figure, the two sockets are

separated by a distance of 0.2", with
all the respective pins connected by
copper traces, except pins 1, 20, and
22. I use bare wrapping (28 gauge)
wire. Make a tiny hook on one end of
the wire, solder it to the pin, wrap
the wire on the corresponding pin of
the other socket for half a loop,
solder and cut the wire with a razor
blade or X-ACTO knife at the base of
the pin. Do all the 25 pins shown in

the diagram. This will, with high
probability, solve your problem. In the
worst case you may have to duplicate
all the traces on the back of the
daughter-board using wire-wrap wire. Do
not use a soldering iron rated higher
than 15 watts.

C) A third source of the cracks, is the
protrusion of the daughter-board on top
of the QL mother-board, and the
pressure applied by the back of the
keyboard. On the Samsung QLs, there is
a screw on the back of the keyboard,
which interferes with the top of the
new EPROM that you install. One must
remove this screw. Even the removal of
this screw does not solve the problem,
always. It is suggested that of the
eight screws holding the keyboard and
the base of the OL together, two
screws, one in back and one in front,
not to be installed. These are the
screws which are left of center,
roughly in alignment with the ROM
sockets. It is worth mentioning, that
depending on the height of the
daughter-board, even the mother-board
can be flexed by the pressure exerted
through the daughter-board from the
keyboard.

PO PO OS OS PD PD OS PO PD OO POD PP PO DO PO PO OO PG OO PO PO CO

QL WOE 2

In the Mar/Apr 93 issue of Sink-Link,
an article “Notes On QL Lock-Ups” by
Hugh Howie, and I quote; “I know of one
person who has four QLs and is only now
starting to have some success with one
of them. Power Surges?” Some QLs have
exhibited this problem since its
introduction into the market place. I
have analyzed the problem, and believe
I have a low cost solution. I suggest
that people facing this so called
HEATING problem, send me $2.00 cash,
for the cost of a device, jiffy-bag,
and mailing by return mail.

PS. After the above article was
published, I received the Mark I
version of Minerva 1.97. The daughter-
board carrying a 1990 Copyright, is the
best I have ever seen (in the QL
market). It addresses all my
objections. It has metalization on top
and bottom with machine inserted metal
eyelets connecting the top and bottom
traces, with ground planes. Best yet,
they have used only one machined socket
for both the EPROM and the connection
to the mother-board.

Nazir Pashtoon
940 Beau Dr. Apt. 204
Des Plaines, IL 60016-5876

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CHICAGO AREA TIMEX USERS GROUP
613 PARKSIDE CIRCLE
STREAMWOOD, ILLINOIS 60107